Audio transcription sent to undeclared/test Google Account and not to the provided llm client

[siavashg]

Transcribing audio content will use an unspecified Google API key for the transcription, and not as expected use the provided llm_client.

This is in part solved by #326 which at least provides an option to not route everything this way.

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Instead of relying on the provided LLM llm_client markitdown will process audio via the SpeechRecognition library sr:

markitdown/packages/markitdown/src/markitdown/converters/_transcribe_audio.py

Lines 45 to 49 in da7bcea

	recognizer = sr.Recognizer()
	with sr.AudioFile(audio_source) as source:
	audio = recognizer.record(source)
	transcript = recognizer.recognize_google(audio).strip()
	return "[No speech detected]" if transcript == "" else transcript

In SpeechRecognition recognize_google is mapped to google_legacy:

https://github.com/Uberi/speech_recognition/blob/46e70560f605ed190b3b0c16f198ee34978de585/speech_recognition/__init__.py#L1288

The google_legacy method even comes with this warning (although does not declare where this key comes from and how the data may be used):

The Google Speech Recognition API key is specified by key. If not specified, it uses a generic key that works out of the box. This should generally be used for personal or testing purposes only, as it may be revoked by Google at any time.

https://github.com/Uberi/speech_recognition/blob/46e70560f605ed190b3b0c16f198ee34978de585/speech_recognition/recognizers/google.py#L225-L262

As it's using some unspecified API key
https://github.com/Uberi/speech_recognition/blob/46e70560f605ed190b3b0c16f198ee34978de585/speech_recognition/recognizers/google.py#L118-L119